Rock-drilling machine.



Patented Feb. 1.7 1914.

FRANZ BABE, OF PEINE, GERMANY.

ROCK-DRILLING MACHINE.

Specification of Letters Patent.

Application filed May 19, 1811.

To all trim/1t it may concern lle it known that I, FRANZ BAoE, a subject of the Emperor of Germany, residing at Ieiue, in Germany, have invented certain new and useful Improvements in Roclr-Di'ill ing Machines, of which the following is a. specifiea t-ion.

In hoping test-holes and performing simi' lar operations with diamond or toothed drills it is of prime importance to insure that a. good stream of water always plays upon the drill while the latter is working. but it is also desirable that the supply of water is available, and can be directed upon the bore-hole for cleansing purposes, while the drill is not atwork.

The object of the present invention is to provide means for this purpose.

The invention is illustrated in the accompanying drawing, in which--' l ig'ure l is an elevation of a drilling machine with pump, partly in section. Fig. 2 is a sectional view of an auxiliary device for use in connection with the construction shown lll Fig. 1. Fig. 3 shows another modification of the device, and Fig. 4 shows an electric switch adapted for the purposes of the invention. k

The machine shown in Fig. 1 has three pulleys a, b, c. The pulley a; is normally loose on the shaft ll, .but fixed to the sprocket wheel i coiu' ected by chain 2' to the shaft of the winch drum Z, so that the latter can be actuated by clutching the pulley (1 to the shaft for the purpose of traversing the drill. A clutch (1 is indicated in Fig. 1 for this purpose. The pulley b is fixed to the shaft (l and serves for actuating the pump f by means of toothed gears e 6 The pulley c is loose on the shaft. (i and serves for actuating the boring spindle h by means of gears g and 9 The widths of the several pulleys and the driving belt Z are so proportioned that the belt can work on the pulley a alone and can drive the pulley Z) while partly resting on the pulley a, but can never be shifted clear of the pulley 1) onto the pulley c; that is to say, the pulley I) must be driven while the pulley 0 is driven. The pump is used to direct astream of water onto the drill throu h a pipe located in a suitable position, and the arrangement described insures that the pump is always started before the drill.

Patented Feb. 1'7, 1914.

Serial No. 628,283.

Fig. shows a device for temporarily checking the shifting of the belt by the belt-shifter m after the pump has been started but before the belt has reached the pulley c, the object of this device being to insure that the pump is not only being driven, but is actually playing upon the drill, before the latter is started.

The checking device comprises the .rod n which is fixed to the piston 01, working in the cylinder 6. The spring '0 normally thrusts the rod n into the path of the belt-shifter m, at the point at which the latter is about to shift the belt on to the pulley 0, but when the pump is delivering, it forces water through the port n into the cylinder t, and the water depresses the piston, thus withdrawing the rod from the path of the beltshifter.

It is not essential to combine a pump with the drilling machine, if equivalent means are available for supplying a stream of cooling liquid. as for example a pipe connected to a main, controlled by a valve which must be opened before the actuating mechanism of the drill can be thrown into gear. A modification of this kind is illustrated in Fig. 3, in which 0 is the supply pipe, 0 the controlling valve and 0 the rod for checking the belt-shifter m before the latter can shift the belt I on to the drill actuating pulley. The rod 0 is connected to the valve, so that by the act of opening the latter the rod is withdrawn from the path of the beltshifter.

In an electrically actuated drilling machine the circuits of the pump and the drill actuating mechanism may be controlled by a switch as shown in Fig. 4. In this figure w represents the main feeder, y and a being wires leading to the motors of the pump and drill respectively. By moving the switch arm 7) to the right, connection is first made through the contact bar 1" to the pump motor, and then through thecontact bar 8 to the drill motor.

What I claim as my invention and desire to secure by Letters Patent of the United States is In a rock drilling machine the combination of a drill, drill actuating mechanism, a device for starting said drill actuating mechanism, means for supplying liquid to the drill', a device for controlling said liquid supplying means disposed s0 tha vice must be aatuated for ynmural of supply prior to operativnuof the din) starting the drill actuating :xmumu V a check for 521151 starting device adapted be disabled by the, actimi'zf the iiquiai v .3 

